Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old English -ian
← Proto-Germanic *-ōną (inherited)
← Proto-West Germanic *-ōjan (mention)
← Proto-West Germanic *-ōn (inherited)

→ English bright (mention)
→ English drop (mention)
→ Old English blostmian (affix)
→ Old English badian (affix)
→ Old English æmtian (affix)
→ Old English ærendian (affix)
→ Old English æswician (affix)
→ Old English ætrian (affix)
→ Old English ceorlian (affix)
→ Old English wifian (affix)
→ Old English agnian (affix)
→ Old English siþian (affix)
→ Old English logian (affix)
→ Old English brycgian (affix)
→ Old English dropian (affix)
→ Old English wundrian (affix)
→ Old English neodian (affix)
→ Old English prician (affix)
→ Old English sceadwian (affix)
→ Old English spelian (affix)
→ Old English tæppian (affix)
→ Old English þreatian (affix)
→ Old English wacian (affix)
→ Old English weodian (affix)
→ Old English willian (affix)
→ Old English æfnian (affix)
→ Old English eardian (affix)
→ Old English weorþian (affix)
→ Old English þenian (affix)
→ Old English gieddian (affix)
→ Old English fultumian (affix)
→ Old English ladian (affix)
→ Old English andweardian (affix)
→ Old English feormian (affix)
→ Old English þegnian (affix)
→ Old English dafenian (affix)
→ Old English þeahtian (affix)
→ Old English cystan (affix)
→ Old English geomrian (affix)
→ Old English fulwihtian (affix)
→ Old English herebeorgian (affix)
→ Old English bisgian (affix)